package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
//import com.sky.websocket.WebSocketServer;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.connection.SortParameters;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PutMapping;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * 用户订单相关接口
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private WebSocketServer webSocketServer;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    /**
     * 接口幂等性通过
     * 用户将商品添加到购物车，用户点击支付操作，
     * 执行下单操作之前要去判断当前用户id下购物车中是否存在商品，存在则抛出异常，不存在则插入订单表
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
//        处理各种业务异常（地址簿为空、购物车数据为空）
//        查询地址簿
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
//        判断下单地址是否为空
        if (addressBook == null) {
//            抛出业务地址簿异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
//        查询购物车
        ShoppingCart shoppingCart = new ShoppingCart();
//        获取用户id
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
//        接口幂等性
//        判断购物车数据是否为空
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
//            抛出购物车业务异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
//        1.向订单表插入1条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setPhone(addressBook.getPhone());

        String address = addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail();
        orders.setAddress(address);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setUserName("大北极熊");
        orders.setUserId(userId);
        //todo
//        orders.setAddressBookId(addressBook.getId());
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);//未支付
        orders.setStatus(Orders.PENDING_PAYMENT);//待付款
        orders.setConsignee(addressBook.getConsignee());//Consignee：收货人
        orderMapper.insert(orders);
        List<OrderDetail> orderDetailList = new ArrayList<>();
//        2.构建订单明细OrderDetail对象
//              向订单明细表批量插入n条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());//获取当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }
//              执行批量插入
        orderDetailMapper.insertBatch(orderDetailList);

//        3.清空当前用户的购物车

        shoppingCartMapper.deleteByUserId(userId);
//        4.将返回结果封装成VO对象。
       /* OrderSubmitVO orderSubmitVO = new OrderSubmitVO();
        orderSubmitVO.setOrderTime(orders.getOrderTime());
        orderSubmitVO.setOrderNumber(orders.getNumber());
        orderSubmitVO.setId(orders.getId());
        orderSubmitVO.setOrderAmount(orders.getAmount());*/
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .build();

        return orderSubmitVO;
    }


    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        /*//调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );*/
        //生成空的json，跳过微信支付流程
        JSONObject jsonObject = new JSONObject();
        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
//        通过websocket向客户端推送消息 type orderId content
            Map map =new HashMap();
            map.put("type",1);//1.表示来单提醒    2.表示客户催单
            map.put("orderId",ordersDB.getId());
            map.put("content","订单号："+outTradeNo);
            String json=JSON.toJSONString(map);
            webSocketServer.sendToAllClient(json);
    }

    /**
     * 用户端订单分页查询
     *
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {

        /*
         * 1.先根据userid查询出所有的订单信息 orders
         *
         * 2.根据订单的id 查询订单明细表中的订单明细信息（具体的菜品、套餐信息）
         *
         * 3.统一封装成orderVO对象返回
         * */

//        设置分页
        PageHelper.startPage(pageNum, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
//        分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList();
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();//获取订单id
//                查询出订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId2(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }

        }

        return new PageResult(page.getTotal(), list);

    }

    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
/*//        根据id查询出具体的订单明细信息，返回一个集合对象
        Orders orders = orderMapper.getById(id);
        Long orderId = orders.getId();
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
    //        AddressBook addressBook = addressBookMapper.getById(id);
            *//*String address=addressBook.getProvinceName()+addressBook.getCityName()+addressBook.getDistrictName()+addressBook.getDetail();
            orderVO.setAddress(address);*//*
           *//* orderVO.setAddressBookId(orders.getAddressBookId());
            log.info("收货地址为：{}"+orderVO.getAddressBookId());*//*
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;*/

        // 根据id查询订单
        Orders orders = orderMapper.getById(id);
        // 查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId2(orders.getId());
        // 将该订单及其详情封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 用户取消订单
     *
     * @param id
     */
    @Override
    public void userCancelById(Long id) {
        /*-
        订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        -待支付和待接单状态下，用户可直接取消订单
        - 商家已接单状态下，用户取消订单需电话沟通商家
        - 派送中状态下，用户取消订单需电话沟通商家
        - 如果在待接单状态下取消订单，需要给用户退款
        - 取消订单后需要将订单状态修改为“已取消”*/

//        1.根据id查出订单状态
        Orders order = orderMapper.getById(id);
//        对订单进行校验
        if (order == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
//        获取订单的状态
        Integer orderStatus = order.getStatus();
        //        2.对订单状态进行判断    status : 1 or 2 可直接取消订单
        if (orderStatus > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(order.getId());
        // 订单处于待接单状态下取消，需要进行退款
        if (orderStatus.equals(Orders.TO_BE_CONFIRMED)) {
            log.info("操作退款！！！");
            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }
        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelTime(LocalDateTime.now());
        orders.setCancelReason("用户取消");
        orderMapper.update(orders);

    }

    /**
     * 用户再来一单
     *
     * @param id
     */
    @Override
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId2(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }


    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId2(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     *接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒绝订单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (orders == null || !orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        /*//支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }*/
// 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders order = new Orders();
        order.setStatus(Orders.CANCELLED);
        order.setCancelReason(ordersRejectionDTO.getRejectionReason());
        order.setCancelTime(LocalDateTime.now());
        order.setId(orders.getId());
        orderMapper.update(order);
    }

    /**
     * 派送
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders orders = orderMapper.getById(id);
        // 校验订单是否存在，并且状态为3
        if (orders == null || !orders.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders order=new Orders();
            order.setId(orders.getId());
        // 更新订单状态,状态转为派送中
            order.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(order);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        Orders orders = orderMapper.getById(id);

        if (orders == null || !orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders order = new Orders();
        order.setId(orders.getId());
        order.setStatus(Orders.COMPLETED);
        order.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(order);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {

        Orders orders = orderMapper.getById(ordersCancelDTO.getId());
        /*//支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }*/

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders order = new Orders();
        order.setId(orders.getId());
        orders.setStatus(Orders.CANCELLED);
        order.setCancelReason(ordersCancelDTO.getCancelReason());
        order.setCancelTime(LocalDateTime.now());
        orderMapper.update(order);

    }

    /**
     * 统计各订单状态数量
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed=orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO(toBeConfirmed,confirmed,deliveryInProgress);
        return orderStatisticsVO;
    }

    @Override
    /**
     * 用户催单
     *
     * @param id
     */
    public void reminder(Long id) {
        // 查询订单是否存在
        Orders orders = orderMapper.getById(id);
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //基于WebSocket实现催单
        Map map = new HashMap();
        map.put("type", 2);//2代表用户催单
        map.put("orderId", id);
        map.put("content", "订单号：" + orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

}
